KR950007430A

KR950007430A - Adaptive Ghost Removal Device and Method

Info

Publication number: KR950007430A
Application number: KR1019930017201A
Authority: KR
Inventors: 박성륭
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1993-08-31
Filing date: 1993-08-31
Publication date: 1995-03-21
Also published as: KR960016564B1

Abstract

본 적응적인 고스트제거장치 및 방법은 수신되는 신호에 실려 있는 고스트중 선고스트의 크기 및 위치와 파형등화의 필요성의 정도에 따라 FIR필터의 센터탭의 위치를 적응적으로 조절하여 고스트를 제거하기 위한 것이다. 이를 위하여 인가되는 신호에 대하여 선형 위상필터링을 하여 수신되는 신호에 대하여 선고스트 제거 및 파형등화를 하는 유한충격응답필터링시 센터탭의 위치를 채널 특성화처리 결과신호에 의하여 자동조절되도록 제어하도록 구성된다.This adaptive ghost elimination device and method is adapted to remove ghosts by adaptively adjusting the position of the center tap of the FIR filter according to the magnitude and position of the ghosts in the received signal and the degree of necessity of waveform equalization. will be. To this end, the position of the center tap is controlled to be automatically adjusted by the channel characterization result signal during the finite shock response filtering that performs linear phase filtering on the applied signal and performs line ghost removal and waveform equalization on the received signal.

따라서 유한충격응답필터링에 의한 고스트제거를 좀더 효율적으로 수행할 수 있다.Therefore, ghost elimination by finite impact response filtering can be performed more efficiently.

Description

Adaptive Ghost Removal Device and Method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 적응적인 고스트제거장치도이다,1 is an adaptive ghost removal apparatus according to the present invention,

제2A,B,C도는 채널특성화 결과에 따른 FIR(Finite Impulse Response) 필터의 센터탭(Center Tap)의 위치를 나타낸 것이다.2A, B and C show the positions of the center taps of the finite impulse response (FIR) filter according to the channel characterization result.

Claims

A ghost removing apparatus of a high quality image signal processing system for removing ghost generated by a reflected wave signal applied together with a received direct wave signal; First filtering means (10) for performing linear phase filtering on the applied signal and performing finite shock response filtering for pre-ghost elimination and waveform equalization on the received signal; Control means (30) for automatically adjusting the position of the center tap of the first filtering means (10) according to the channel characterization result signal for the ghost; A second filter for filtering the signal output from the first filtering means 10 by a predetermined transfer function, and performing feedback coupling to linearly combine with the current input value to remove long ghosts for the received signal; Adaptive ghost removal device characterized in that it comprises a filtering means (20).

The method of claim 1, wherein the control means (30) outputs a control signal so that the center tap of the first filtering means (10) is assigned to the front part when the waveform equalization is not necessary due to the channel characterization result signal. When the ghost is generated by the result signal, a control signal for allocating the center tap to the position where the ghost is generated is output. When the waveform equalization is required by the result signal, the center tap is located at the center. Adaptive ghost agent, characterized in that for outputting a control signal to be assigned.

In order to remove the ghost generated by the reflected wave signal applied together with the received direct wave signal, first, the finite shock response filtering process for filtering the applied signal by the linear phase characteristic, and the finite shock response filtering process A ghost elimination method comprising an infinite shock response filtering process for infinitely impact response filtering so that a signal currently input and a previously input value are linearly coupled to a signal; A channel characterization process for performing a channel characterization process on the received signal to determine a degree of distortion; A first center tap control process for controlling to assign a center tap to a front part when the finite shock response filtering for ghost removal is performed when the waveform characterization is not necessary; A second center tap control process for controlling to allocate the center tap to a portion where the sun ghost is generated during the finite charge filtering when the channel ghosting is present as a result of the channel characterization process; And a third center tap control process for controlling the center tap to be allocated to the center when the finite shock response filtering is required when the waveform equalization is necessary as a result of the channel characterization process.

※ Note: The disclosure is based on the initial application.